I'm wondering if the cost of diamond tipped blades and bits may rise in
the near future. One of the biggest fastest growing fad in jewelry is
"chocolate" and "black" diamonds. In the past most all brown and black
diamonds ended up on tools. Now they are getting good money for them in
jewelry stores.

Actually most of the diamond tipped tools people here use are often made
out of such small "scraps" of diamonds that maybe there won't be a
difference. But in heavy industrial applications that use sizable
diamonds to cut with could find some real competition with jewelers.